Villain is a good aggressive regular with stats of 24/20 and attempt to steal blinds of 33% over quite a few hands.

Effective stacks 1400

He opens to 35 OTB. I reraise to 130 with [Qs] in the SB. He calls.

Flop [Ks][4h] (270)
I bet 210, he calls.

Turn (680)
What is my plan here?
Bet 450, call a push. CRAI? Check fold.

I checked, he bet 350, and I called with NFD and a gutshot. I hate that.

River (1180)
I have 700 left. I check and fold to his push. I hate that too.

I think a turn fold would be really bad if your opponent floats/bluffs at all. It's a button raiser after all it's not like he 3-bet an UTG.

What other hands are you c/c the turn with? [Qs] and [Qs]? Ax[Js]? If your c/c range on the turn is really narrow, and If you do c/c the turn with KxQs then I think calling sometimes and folding the river sometimes with AQ is probably right.

I check this flop a lot, but betting is the standard. I don't really 3-bet that many suited connectors to button opens here, so I don't have as much need to balance flop bluffs by betting here with AQ all the time.

I would tend to bet the turn here, for about $405 or so. Then I just ship the rest in on pretty much any river. I fire a pretty good amount of 2 and 3-barrels and I like to value bet a lot of streets pretty thinly to balance it.

I wouldn't be too worried here. It's doubtful he called the flop (or pre flop for that matter) with QJ, right? The A, K, Q, and T of spades are all accounted for, so his flush has to be J9 or worse. I find that a lot of players can't resist raising this flop with 89 of spades when they do call the re-raise, which makes me fear the flush even less. Also these stacks are pretty good for 4-bet bluffing, imo, so if he had J9s or 78s or whatever and thought you were getting a little out of line and wanted to play back, he would be better suited to do it in the form of a pre flop 4-bet than to call in position.

A good aggressive regular would prolly be 4-betting AK here, I think? Assuming he knows you're a good regular too, and not a standard more passive Euro-player. It's doubtful he called with AT pre flop.

I think his range is sorta like sets and garbage, as played.

Meant to edit the last post, instead I quoted it. Woot post count = post count +1.

No one is happy taking your line here, but I think it was the best one. You are going to be shown suited connectors or a set against a good player more than a weaker A or something you beat.